Started in Japan, meaning to have sex, often using a pelvic thrust when doing so.
Caused when a American English teacher told some Japanese kids on a soccer field the English words for waist and shake. So being the kids they are they put it together to come up with a new word for sex that no one really understands outside of the kids...except for the one guy who helped start it.

A japanese slang term for Sexual Intercourse. Originated in a Japanese school because of an American teacher teaching English to Japanese kids translated Waist, and then Shake to some of the students. The students then took that to mean Sexual Intercourse.

Started in Japan. Meaning to have sex, often using a pelvic thrust when doing so.
Caused when a American English teacher told some Japanese kids on a soccer field the English words for waist and shake. So being the kids they are they put it together to come up with a new word for sex that no one really understands outside of the kids...except one guy.